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CVE-2026-0672

Header injection in http.cookies.Morsel

Published: Jan 20, 2026Updated: Jan 26, 2026 Sources: CVE List NVD BDUCWE-93
NVD MITRE
7.1CVSSHIGH
EPSS Score
0.4%
Top 68.3%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

When using http.cookies.Morsel, user-controlled cookie values and parameters can allow injecting HTTP headers into messages. Patch rejects all control characters within cookie names, values, and parameters.

CVSS Vector Breakdown

AV:NAC:LC:NI:LA:H
Exploitability
AV:NAccess Vector
Network
AC:LAccess Complexity
Low
Impact
C:NConfidentiality
None
I:LIntegrity
L
A:HAvailability
H
Open in CVSS calculator →

Weaknesses

CWE-93

Affected Products

Red Hat Enterprise LinuxRed Hat Inc.
On-premOS
Operating Systems / linux-distro
Astra Linux Special EditionООО «РусБИТех-Астра»
On-premOS
Operating Systems / linux-distro
PythonPython Software FoundationOSS Libraries
РЕД ОСООО «Ред Софт»
On-premOS
Operating Systems / linux-distro
Platform V SberLinux OS ServerАО «СберТех»
On-premOS
Operating Systems / linux-distro
red hat inc.commercialUSOperating Systemsaka red hat
ооо «русбитех-астра»commercialRUOperating Systemsaka rusbitech-astra
python software foundationoss-projectUSOSS Librariesaka python software foundation, psf
ооо «ред софт»commercialRUOperating Systemsaka red soft
ао «сбертех»commercialRUOperating Systemsaka ao sbertech, сбертех
and 2 more affected products View all →

Exploitability

Official Patch Available

References

https://github.com/python/cpython/commit/62700107418eb2cca3fc88da036a243ea975f172
github.com
https://github.com/python/cpython/commit/712452e6f1d4b9f7f8c4c92ebfcaac1705faa440
github.com
https://github.com/python/cpython/commit/7852d72b653fea0199acf5fc2a84f6f8b84eba8d
github.com
and 11 more references View all →

Timeline

Published
Jan 20, 2026
Last Updated
Jan 26, 2026

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